Oxidized Bitumen 85/25 – Premium Grade from Pars Bitumen

 

Description: 

At Pars Bitumen, we are proud to offer industry-leading Oxidized Bitumen 85/25, a durable and versatile material engineered for demanding construction and industrial applications. Oxidized (or blown) bitumen is produced by passing hot air through penetration-grade bitumen, transforming it into a harder, higher-softening-point product with excellent adhesive and waterproofing properties.
With the 85/25 designation, the softening point is approximately 85 °C and the penetration grade around 25 dmm — which delivers a product tailor-made for high-performance uses.
This article explains the specific features, applications, and benefits of this grade, and offers reasons why Pars Bitumen’s product stands apart in the market.

Specific Features of Oxidized Bitumen 85/25

Here are the standout characteristics of this material:

High softening point: Typically around 85 °C (± 5°C) for the 85/25 grade, meaning it remains stable under elevated temperatures and is less prone to flow or deform.

Low penetration value: With a penetration around 20-30 (mm/10) under standard test, the bitumen is harder and less susceptible to shear or penetration under load.

Excellent adhesive properties: The oxidation process enhances binding with substrates (metal, concrete, membranes) and improves long term adhesion.

Water- and weather-resistance: Has strong resistance to moisture ingress, UV, and weathering; suited for waterproofing and exterior applications.

Thermal stability: Less sensitive to temperature fluctuations; remains functional at ambient temps as well as under hot service conditions.

Chemical and corrosion resistance: Capable of resisting many acids, alkalis and salts, making it viable for industrial and pipeline coatings.

Versatile packaging & supply: Available in drums, bulk, bags — making it suitable for large-scale industrial supply chains.

At Pars Bitumen, we ensure quality by adhering to strict manufacturing controls and testing protocols — delivering material you can rely on in demanding conditions.

Applications of Oxidized Bitumen 85/25

Because of the features above, the 85/25 grade finds wide use across various sectors. Here are key application areas:

1. Roofing and waterproofing

Used in hot-applied membrane systems, roofing felts, damp-proof courses and waterproof coatings.

Ideal for flat roofs, basement waterproofing, pond liners, and building envelopes.

 

2. Pipeline & corrosion protection

Coating of steel or ductile iron pipes for oil & gas, water supply, and industrial plants. Its adhesion and chemical resistance ensure long life.

Also used for joint sealing, mastic for pipeline connections, and anti-corrosion coatings.

 

3. Road construction & paving maintenance

Although not the typical binder for high-volume surfacing, it is used in expansion joints, crack sealing, emulsion coatings and asphalt additives where higher softening point is needed.

Also used in dams, embankments, hydraulic structures in civil works.

 

4. Industrial flooring, adhesives, and insulation

Used in tile adhesives, carpet backing, insulation sheets, acoustic panels, and even artificial turf underlays.

Forms the basis of bituminous paints, sealants, mastics for industrial plants.

 

5. Automotive & special uses

Under-carriage sealants, dust-proofing and sound-proofing materials for vehicles. Also adhesives for wiring and electric cable joint protection.

 

 

Why Choose Pars Bitumen’s Oxidized Bitumen 85/25?

Reliability: Our production process ensures conformity with ASTM/EN standards for softening point, penetration, solubility and heat loss.

Supply chain: Flexible packaging (drums, bags, jumbo-bags, bulk) means you can optimise logistics based on your project.

Technical support: We provide technical data sheets, installation guidelines and post-sale support for optimal deployment.

Global reach, local service: Whether you’re in the Middle East, Central Asia or further afield, Pars Bitumen is equipped to serve your project needs with timely delivery.

Cost-effective long life: Due to its durability and stability, your investment in Oxidized Bitumen 85/25 pays off by reducing maintenance, repair and replacement.

 

 

Installation & Handling Tips

To ensure optimal performance of oxidized bitumen 85/25, follow these guidelines:

Heat the material to approximately twice its softening point to achieve flow and workable viscosity.

Surface preparation is critical: Ensure the substrate is clean, dry, free of loose particles or previously applied curing compounds.

Apply in accordance with recommended thicknesses and in ambient conditions suited for hot application.

Storage: Although durable, avoid repeated excessive heating/cooling cycles; follow manufacturer’s storage guidelines.

Safety: Operate in well-ventilated areas; adhere to MSDS/technical data sheet for handling heated bitumen.

 

 

Conclusion

For projects where durability, high-temperature resistance, adhesion and waterproofing matter, Pars Bitumen’s Oxidized Bitumen 85/25 is a top-choice material. Whether you’re waterproofing a roof, coating a pipeline, sealing expansion joints, or producing industrial adhesives and mastics — this grade delivers performance you can depend on.
Choose the trusted supplier, choose Pars Bitumen, and let your next project benefit from the strength and resilience of 85/25 oxidized bitumen.

 

Specification of Oxidized Bitumen 85/25

Analysis bitumen 85/25  PARS BITUMEN

Bitumen 85/25	Test method	Unit	Specification
Specific gravity @25/25 C	ASTM D70	(Kg/m3)	1.05 approx.
Penetration @ 25°c	ASTM  D5	mm/10	20/30
Softening point °c	ASTM  D36	°C	80/90
Ductility @25 °c	ASTM  D113	Cm	3 min
Loss on heating(wt) %	ASTM  D6	Wt. %	0.2 max
Flashpoint c	ASTM D92	°C	250 min
Solubility is CS2(wt) %	ASTM  D4	Wt. %	99.5 max
Spot test	A.A.S.H.O.T 102	—	Negative

Contact Pars Bitumen:

🌐 Website: www.parsbitumen.com
📧 Email: sales@parsbitumen.com
📞 WhatsApp: +98 912 387 9127

 

Written and Gathered by Pars Bitumen Company